文章基本信息

标题：Single Shot Coherence Properties of the Free-Electron Laser SACLA in the Hard X-ray Regime
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作者：Felix Lehmkühler ; Christian Gutt ; Birgit Fischer 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep05234
语种：English
出版社：Springer Nature
摘要：We measured the coherence properties of the free-electron laser SACLA on a single shot basis at an X-ray energy of 8 keV. By analysing small-angle X-ray scattering speckle patterns from colloidal dispersions we found a degree of transverse coherence of β_t = 0.79 ± 0.09. Taking detector properties into account, we developed a simulation model in oder to determine the degree of coherence from intensity histograms. Finally we calculated a coherence time of τ_c = 0.1 fs and a pulse duration of 5.2 fs which corresponds with previous predictions.